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p-ERK has an important role in the Cd-induced migration and invasion of A549 cells. (A) Western blot analysis was conducted to measure the expression of p-ERK in the presence of 2 µM Cd and 10 µM U0126. (B) Migration and (C) invasion assays were performed in the presence of 2 µM Cd and 10 µM U0126, and quantified as the fold change with respect to the control (magnification, ×200). Cd, cadmium; p, phosphorylated.
